Paul Mackie, Mobility Lab chimes in as well:
https://mobilitylab.org/2013/02/14/maryland-mandatory-bike-helmet-law-would-make-streets-less-safe/

Biking in Baltimore
Paul Mackie, Mobility Lab chimes in as well:
https://mobilitylab.org/2013/02/14/maryland-mandatory-bike-helmet-law-would-make-streets-less-safe/